Continue to address the issue of function self-invocation

scripts/menus/9_upgrade.sh

@@ -389,8 +389,11 @@ setziptype(){
 	esac
 	setconfig zip_type "$zip_type"
 }
-setcore(){ #内核选择菜单
-	#获取核心及版本信息
+
+# 内核选择菜单
+setcore() {
+    while true; do
+        # 获取核心及版本信息
         [ -z "$crashcore" ] && crashcore="unknow"
         [ -z "$zip_type" ] && zip_type="tar.gz"
         echo "$crashcore" | grep -q 'singbox' && core_old=singbox || core_old=clash
@@ -429,7 +432,8 @@ setcore(){ #内核选择菜单
         echo "0 返回上级菜单"
         read -p "请输入对应数字 > " num
         case "$num" in
-	0)
+        "" | 0)
+            break
             ;;
         1)
             [ -d "/jffs" ] && {
@@ -439,40 +443,47 @@ setcore(){ #内核选择菜单
             crashcore=meta
             custcorelink=''
             getcore
+            break
             ;;
         2)
             crashcore=singboxr
             custcorelink=''
             getcore
+            break
             ;;
         3)
             crashcore=singbox
             custcorelink=''
             getcore
+            break
             ;;
         4)
             crashcore=clash
             custcorelink=''
             getcore
+            break
             ;;
         5)
             setziptype
-		setcore
             ;;
         6)
             setcustcore
-		setcore
             ;;
         7)
             getcore
+            break
             ;;
         9)
             setcpucore
+            break
             ;;
         *)
             errornum
+            sleep 1
+            break
             ;;
         esac
+    done
 }
 
 #数据库